My GGM Marie Hrabak immigrated in 1886 (after losing a first husband) to join her brothers John, Albert and Vaclav/James who came about 1881 and settled in western PA, to work the coal fields in the Connellsville and Mt Pleasant areas. Parents were Wencl and Josephine, and they were born in the 1850s. Marie was born in either 1848 or 1850, depends on the source. They were from the Pilsen area---one married a girl from Cheznovice, had photos taken in Rokycan, all of this was 6-12 miles east of the city. Might there be a match with your families there?
All had large families, James' branch moved to Cleveland area between 1910 -20 or so.